Title :
Fluid temperature compensation in a hot wire anemometer using a single sensor
Author :
Ferreira, Rômulo P C ; Freire, Raimundo C S ; Deep, Gurdip S. ; Neto, J. S Rocha ; Oliveira, Amauri
Author_Institution :
CEFET-AL, Brazil
Abstract :
In conventional constant temperature hot-wire anemometer, the compensation for the fluid temperature is done by using two sensors. In this paper, the analysis of a anemometer using only one sensor, operating alternately at two different temperatures is presented. The effect of the amplifier input offset voltage is taken into account, and its influence on the measurement of fluid velocity is quantified. Preliminary experimental results are also presented
Keywords :
anemometers; bridge circuits; compensation; operational amplifiers; amplifier input offset voltage effect; bridge resistors; circuit configuration; electrical equivalence; fluid temperature compensation; fluid velocity measurement; hot wire anemometer; op amp limitations; single sensor; thermodynamic equilibrium balance; thermoresistive sensor; Circuits; Fluid flow measurement; Operational amplifiers; Resistance heating; Temperature sensors; Thermal sensors; Thermoresistivity; Velocity measurement; Voltage; Wire;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-5890-2
DOI :
10.1109/IMTC.2000.846918
